Delete row sig_92c10af86c8d from signals

id sig_92c10af86c8d
event_id evt_4a785c5e4d74
watcher_id NULL
signal_type news_headline_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source news_rss
reason_trace {"_evidence_event_ids":["evt_097b3d758 ...
dedupe_key signal_enriched:news_delta:26b555de09b6a900
throttle_s 0
created_at 2026-04-13T02:53:20.296617+00:00
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